4,076 research outputs found
Angle observation of laser peripheral iridoplasty for the treatment of acute angle-closure glaucoma which could not be controlled by drugs
AIM: To evaluate the effect of laser peripheral iridoplasty(LPIP)to treat acute angle-closure glaucoma(AACG)which could not controlled by drugs and with persistent ocular hypertension. <p>METHODS: Totally 67 patients(69 eyes)with AACG were performed LPIP when intraocular pressure(IOP)was still over 30mmHg after the medicine therapy for 3-6 hours. Visual acuity and intraocular pressure were under detection before laser treatment and 30 minutes, 60 minutes and 2 hours after laser treatment. We measured the anterior chamber depth, width of angle, iris thickness with ultrasound biomicroscope(UBM). Dynamic gonioscopy was used to evaluate the degree of peripheral anterior synechia(PAS).<p>RESULTS: Angle open distance(AOD)after iridoplasty was increased(<i>P</i><0.01). Trabecular-iris angle(TIA)was widen(<i>P</i><0.01)and the extents of PAS were reduced in some cases. IOP reduced at different levels in different time after laser treatment. The mean IOP before acute attack was(53.81±10.22)mmHg. The mean IOP were(33.81±9.22)mmHg,(21.93±7.19)mmHg and(15.16±3.07)mmHg at 30 minutes, 60 minutes and 2 hours after laser treatment respectively(<i>F</i>=151.79, <i>P</i><0.01). Visual acuity increased in all patients. <p>CONCLUSION: LPIP can deepen peripheral anterior chamber, increase the angle access and lower the IOP immediately. It is an important ongoing adjuvant treatment, which can reduce the patients suffering by lowering the IOP quickly, reduce the damage of visual function caused by long-term high intraocular pressure, avoid side effect of the drugs, and can improve the prognosis
Hierarchical Relational Learning for Few-Shot Knowledge Graph Completion
Knowledge graphs (KGs) are known for their large scale and knowledge
inference ability, but are also notorious for the incompleteness associated
with them. Due to the long-tail distribution of the relations in KGs, few-shot
KG completion has been proposed as a solution to alleviate incompleteness and
expand the coverage of KGs. It aims to make predictions for triplets involving
novel relations when only a few training triplets are provided as reference.
Previous methods have mostly focused on designing local neighbor aggregators to
learn entity-level information and/or imposing sequential dependency assumption
at the triplet level to learn meta relation information. However, valuable
pairwise triplet-level interactions and context-level relational information
have been largely overlooked for learning meta representations of few-shot
relations. In this paper, we propose a hierarchical relational learning method
(HiRe) for few-shot KG completion. By jointly capturing three levels of
relational information (entity-level, triplet-level and context-level), HiRe
can effectively learn and refine the meta representation of few-shot relations,
and consequently generalize very well to new unseen relations. Extensive
experiments on two benchmark datasets validate the superiority of HiRe against
other state-of-the-art methods.Comment: 10 pages, 5 figure
Negative entanglement measure for bipartite separable mixed states
We define a negative entanglement measure for separable states which shows
that how much entanglement one should compensate the unentangled state at least
for changing it into an entangled state. For two-qubit systems and some special
classes of states in higher-dimensional systems, the explicit formula and the
lower bounds for the negative entanglement measure have been presented, and it
always vanishes for bipartite separable pure states. The negative entanglement
measure can be used as a useful quantity to describe the entanglement dynamics
and the quantum phase transition. In the transverse Ising model, the first
derivatives of negative entanglement measure diverge on approaching the
critical value of the quantum phase transition, although these two-site reduced
density matrices have no entanglement at all. In the 1D Bose-Hubbard model, the
NEM as a function of changes from zero to negative on approaching the
critical point of quantum phase transition.Comment: 6 pages, 3 figure
- …